let index_$container = $("div[class='container']");

let index_$logo = index_$container.find("div[class='logo']");

let index_$ul = index_$container.find("ul[class='layui-nav right']");

let index_$username = index_$ul.find("a").eq(0);
let index_$dl = index_$ul.find("dl[class='layui-nav-child']");
let index_$index = index_$ul.find("li[class='layui-nav-item to-index']");